Question: how to resolve extras_require dependency during setup runtime?

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Originally reported by: marscher (Bitbucket: marscher, GitHub: marscher)

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This has been summarised here:

pypa/pip#1993

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• Bitbucket: https://bitbucket.org/pypa/setuptools/issue/256

[ghost]

Original comment by jaraco (Bitbucket: jaraco, GitHub: jaraco):

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Historically, the way packages have solved this problem is by using the deprecated Feature (#65) feature. However, because it's deprecated, the recommended solution is to use extras for your C extension.

So the way you do that is create a separate distribution package for your C extension module, call it say "jpype.numpy" and have it only implement the C extension. Then define your extras in jpype as so:

extras_require=dict(
  numpy=[
    "numpy>=x.x",
    "jpype.numpy>=x.x",
  ],
)

Then, all of the build implications of jpype.numpy can be specified in the setup.py for that package.

Does that approach solve your issue?